Car repair wall anchor expansion screws are used for penetration and pre-insertion installation. By tightening the hexagonal nut, the conical head of the anchor bolt is pulled into the expansion piece, causing it to expand and press against the drill hole wall.
This expansion mechanism can effectively prevent the screw from loosening and is suitable for maintaining stability under long-term vibration and load conditions. Suitable for metal structures, base plates, railings, curtain walls, beams, brackets, windows, etc.